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Patent Searching and Data


Title:
MEDICALLY APPLICABLE ACOUSTIC PULSE GENERATOR
Document Type and Number:
Japanese Patent JPH06292679
Kind Code:
A
Abstract:
PURPOSE: To enable generation of an effective shock wave for a sonic treatment on an object of the interior human body by installing a conversion elements of piezoceramics as an electric sound converter, and allowing bias voltage of reversed polarity to load prior to the attainment of a high voltage pulse. CONSTITUTION: A converter has mosaic-arranged, plural conversion elements of piezoceramics on its carrier and each element 1 is negatively biased so as to be controllable by a positive high voltage pulse. The conversion element 1 is biases reverse to its polarity using, via a resistance 7, high voltage charger 6 connected negatively relative to the conversion element's polarity, while actuating a capacitor 8 as a split capacitor for the bias voltage. A charge capacitor 10 is charged by a high voltage charger 9 to be able to put a high-speed switch 11 formed as e.g. a spark gas closed for a short time by a tripper, thereby the conversion element 1 becomes controllable in the form of a positive high voltage pulse.

Inventors:
BUERUNAA KURAUSU
YAN TSUBUINGENBERUGAA
PEETAA YAAGIYUU
Application Number:
JP3831494A
Publication Date:
October 21, 1994
Filing Date:
March 09, 1994
Export Citation:
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Assignee:
RIHIYARUTO BORUFU GMBH
International Classes:
A61B17/225; A61B18/00; A61B17/22; B06B1/02; B06B1/06; H04R17/08; (IPC1-7): A61B17/36; A61B17/22
Domestic Patent References:
JPH01185261A1989-07-24
Attorney, Agent or Firm:
Haruo Hamada